Trolley-pole.



R. M. CRAIG.

TROLLEY POLE.

APPLICATION FILED MAY 28, 1912.

Patented Dec.31,1912.

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ATTORNEY UNITED STATES PATENT OFFICE.

ROBERT M. CRAIG, OF PATERSON, NEW JERSEY, ASSIGNOR 0F ONE-HALF TO SAMUELMULHOLLAND, 0F PATERSON, NEW JERSEY.

TROLLEY-IPOLE.

Specification of Letters Patent.

Patented Dec. 31, 1912.

Application filed May 28, 1912. Serial No. 700,240.

To all whom it may concern:

Be it known that 1, ROBERT M. CRAIG, a citizen of the United States,residing at Paterson, in the county of Passaic and State of New Jersey,have invented certain new and useful Improvements in Trolley-Poles, ofwhich the following is a specification.

This invention consists in certain improvements in trolley poles, and ithas for its object to provide a trolley pole whose wheel shall be somounted that it will run substantially without friction and will adjustitself to curvatures or bends in the trolley wire.

In the accompanying drawing, Figure 1 is a side elevation of the head ofa trolley pole constructed in accordance with this invention; Fig. 2 isa front elevation, showing the wheel and a part of its bearingformingmeans in section; Fig. 3 is a view of substantially the same characteras Fig. 2, the wheel being shown canted, substantially as it would be inpassing a lateral curvature in the trolley wire; and, Fig. f is aninside face view of one of the two parts of which the wheel is formed.

The head a of the trolley pole is forked or bifurcated in the usual way;its forkmembers Z) 6 are penetrated by the 'horizontal arbor c which maybe held in the fork-members by the pins (Z or otherwise. On this arboris journaled the spherical member 6, the same being penetrateddiametrically by the arbor and having support against any appreciablelateral movement by the fork-members I).

f is the trolley wheel having the usual circumferential exterior groove9 to receive the trolley wire h. The wheel f has a central recess 71which is formed spherical and closely fits around the spherical surfaceof the member 6. At uniformly spaced points the member e is formed witha plurality of sockets 7' arranged circumferentially of said member 6 insuch manner that the central line of each socket is coincident with thatcentral plane of member 6 which is perpendicir lar to its axis ofrotation. In these sockets are arranged the blocks 70, one block to eachsocket, each block being held by its socket against movementcircumferentially of memher 6 but being allowed some slight sidewisemovement. Each block 70 has an exterior spherical recess Z in which isseated and freely revoluble a ball m. The wheel f has an internalcircumferential groove n forming a race in which the balls may run.

In order that the wheel may be assembled with the member 6 I form it intwo sections which are counter-parts of each other, as shown in Fig. 1,each section having ears 0 overlapping the other section and received byrecesses 79 therein, q being screws extending through the ears of onesection and into the other to hold the sections together.

In view of the construction described it will be apparent that thetrolley wheel runs substantially without friction. That, furthermore, itwill adjust itself to bends or curvatures in the trolley wire,particularly those of a lateral nature, the blocks it moving sidewisemore or less as required and the wheel simply canting or tiltingsidewise instead of bodily shifting.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is 1-- 1. In combination, a trolley polehead, a trolley wheel, an axial supporting member for the wheel arrangedin the head and laterally sliding members arranged in said supportingmember and surrounded by the wheel, said wheel and the sliding membersbeing interlocked together against relatively sidewise movement,substantially as described.

2. In combination, a trolley pole head, a trolley wheel, an axialsupporting member for the wheel arranged in the head, blocks havinglaterally sliding movement in said supporting member, said blocks havingoutwardly open recesses and said wheel having an interiorcircumferential groove, and balls interposed between said wheel and theblocks and each engaged in said groove and one of the recesses,substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

ROBERT M. CRAIG. \Vitnesses:

JOHN W. S'rnwARn,

SAMUEL MULHOLLAND.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

